Methods, systems, and devices for wireless communications are described. A user equipment (UE) may receive signaling from a base station including a configuration for multiple transmission time intervals (TTIs) including uplink symbols, downlink symbols, flexible symbols, or a combination. The UE may receive a grant scheduling one or more repetitions of an uplink shared channel carrying an uplink random access message from the base station. The UE may determine available TTIs for the repetitions based on a pre-TTI evaluation of symbols according to a rule that defines types of symbols available for the uplink shared channel. The UE may transmit the repetitions on the available TTIs according to the rule.
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2. The apparatus of claim 1, wherein the combination of the one or more consecutive uplink symbols and the one or more consecutive flexible symbols of each of the one or more corresponding transmission time intervals allow for the one or more repetitions to each be transmitted on a same starting symbol within a respective transmission time interval and have a same transmit duration.
This invention relates to wireless communication systems, specifically improving transmission reliability in scenarios requiring repeated transmissions. The problem addressed is ensuring synchronized and consistent transmission of repeated data bursts across multiple transmission time intervals (TTIs) while accommodating flexible symbol usage. The apparatus includes a transmitter configured to send data in one or more repetitions, where each repetition spans a combination of consecutive uplink symbols and consecutive flexible symbols within a TTI. The uplink symbols are dedicated for uplink transmissions, while the flexible symbols can be dynamically allocated for either uplink or downlink use. The combination of these symbol types in each TTI ensures that all repetitions start on the same symbol position and have identical transmit durations. This synchronization simplifies receiver processing and improves reliability by maintaining consistent timing and duration across repetitions, even when flexible symbols are repurposed for downlink transmissions in some TTIs. The apparatus may also include a receiver to decode the repeated transmissions, leveraging the synchronized structure to enhance error correction. This approach is particularly useful in time-sensitive or high-reliability applications, such as ultra-reliable low-latency communication (URLLC) in 5G and beyond.
4. The apparatus of claim 3, wherein the indication is a one-bit indication that is indicative of whether the flexible symbols are to be considered in the evaluation.
This invention relates to communication systems, specifically to apparatuses for evaluating flexible symbols in data transmission. The problem addressed is the need for efficient signaling to determine whether flexible symbols should be considered during evaluation, reducing complexity and improving processing efficiency. The apparatus includes a receiver configured to obtain a data stream containing flexible symbols, which are symbols that may or may not be used depending on system requirements. A processing unit evaluates these symbols based on an indication received from a transmitter. The indication is a one-bit signal that explicitly tells the receiver whether the flexible symbols should be included in the evaluation process. This binary approach simplifies decision-making, as the receiver only needs to check a single bit to determine the handling of flexible symbols, reducing computational overhead. The apparatus may also include a transmitter that generates the one-bit indication based on system conditions, such as channel state or data priority. The indication is transmitted alongside the data stream, ensuring the receiver can dynamically adapt its processing. This method avoids unnecessary evaluation of flexible symbols when they are not required, optimizing resource usage and improving overall system performance. The invention is particularly useful in systems where flexible symbols are conditionally used, such as in adaptive modulation schemes or dynamic resource allocation, where efficient signaling is critical for maintaining low latency and high throughput.
7. The apparatus of claim 1, wherein the subset of the flexible symbols excludes flexible symbols configured as synchronization signal/physical broadcast channel (SS/PBCH) block symbols.
This invention relates to wireless communication systems, specifically apparatuses for managing flexible symbol usage in a communication frame. The problem addressed is the need to efficiently allocate and exclude certain symbols in a communication frame to optimize resource utilization while avoiding interference with critical synchronization and broadcast channels. The apparatus includes a processor configured to determine a subset of flexible symbols within a communication frame, where these symbols can be dynamically allocated for different purposes. The subset excludes symbols that are designated as synchronization signal/physical broadcast channel (SS/PBCH) block symbols, ensuring that these essential symbols remain available for synchronization and broadcast functions. The processor further assigns the flexible symbols to specific communication tasks, such as data transmission or control signaling, based on system requirements. The apparatus may also include a transceiver to transmit or receive signals using the allocated flexible symbols, and a memory to store configuration data for symbol allocation. By excluding SS/PBCH block symbols from the flexible subset, the apparatus prevents conflicts with critical synchronization and broadcast operations, ensuring reliable system performance. The dynamic allocation of remaining flexible symbols allows for efficient use of available resources, adapting to varying communication demands. This approach is particularly useful in 5G and other advanced wireless systems where flexible symbol usage is essential for optimizing performance.
9. The apparatus of claim 1, wherein the grant schedules a Msg3 transmission in a four-step random access procedure, a Msg3 retransmission in the four-step random access procedure, or both.
This invention relates to wireless communication systems, specifically improving the scheduling of message transmissions in a four-step random access procedure. The problem addressed is the inefficiency in handling Msg3 transmissions and retransmissions during random access, which can lead to delays and resource wastage. The apparatus includes a base station configured to schedule Msg3 transmissions and retransmissions in a four-step random access procedure. The four-step procedure involves a user equipment (UE) sending an initial preamble (Msg1), receiving a random access response (Msg2), transmitting an uplink message (Msg3), and awaiting a contention resolution message (Msg4). The apparatus optimizes this process by dynamically scheduling Msg3 transmissions and retransmissions to reduce latency and improve resource utilization. The base station determines the timing and resources for Msg3 based on network conditions, UE capabilities, and contention levels. It may allocate dedicated or contention-based resources for Msg3 retransmissions, ensuring efficient use of uplink resources. The scheduling mechanism can also prioritize certain UEs or services to enhance performance. By intelligently managing Msg3 transmissions, the apparatus minimizes collisions and retransmissions, improving overall system efficiency.
10. The apparatus of claim 1, wherein the plurality of transmission time intervals comprise a set of slots in a frame or a set of slots in a plurality of frames.
This invention relates to wireless communication systems, specifically to apparatuses for managing transmission time intervals (TTIs) in data transmission. The problem addressed is the need for flexible and efficient scheduling of data transmissions in wireless networks, particularly in scenarios where different transmission durations or frame structures are required. The apparatus includes a transmitter configured to send data over a plurality of transmission time intervals (TTIs). These TTIs can be structured as a set of slots within a single frame or distributed across multiple frames. The apparatus also includes a controller that determines the configuration of these TTIs based on network conditions, such as traffic load, latency requirements, or channel quality. The controller dynamically adjusts the TTI structure to optimize resource utilization and reduce transmission delays. The apparatus further includes a receiver for monitoring feedback from receiving devices, allowing the controller to adapt the TTI configuration in real-time. This adaptability ensures efficient use of network resources while maintaining reliable communication. The invention is particularly useful in 5G and beyond-5G networks, where flexible TTI structures are essential for supporting diverse services, including ultra-reliable low-latency communication (URLLC) and enhanced mobile broadband (eMBB).
12. The method of claim 11, wherein the combination of the one or more consecutive uplink symbols and the one or more consecutive flexible symbols of each of the one or more corresponding transmission time intervals allow for the one or more repetitions to each be transmitted on a same starting symbol within a respective transmission time interval and have a same transmit duration.
This invention relates to wireless communication systems, specifically methods for transmitting repeated data transmissions in a structured manner to improve reliability and efficiency. The problem addressed is ensuring that repeated transmissions of data occur at consistent starting points and durations within predefined time intervals, which is critical for maintaining synchronization and reducing overhead in wireless networks. The method involves configuring transmission time intervals (TTIs) that include a combination of uplink symbols and flexible symbols. Uplink symbols are dedicated to uplink transmissions, while flexible symbols can be dynamically allocated for either uplink or downlink transmissions. By structuring these symbols in a specific sequence, the method ensures that repeated transmissions of data can start at the same symbol position within each TTI and maintain the same duration. This alignment simplifies scheduling and reduces the complexity of managing multiple repetitions across different TTIs. The flexible symbols allow for adaptability in resource allocation, enabling the system to adjust to varying traffic conditions while maintaining the consistency required for repeated transmissions. This approach is particularly useful in scenarios where reliability is critical, such as in machine-type communications or low-latency applications. The method improves efficiency by minimizing wasted resources and ensuring predictable transmission patterns, which enhances overall system performance.
13. The method of claim 11, wherein the grant schedules a Msg3 transmission in a four-step random access procedure, a Msg3 retransmission in the four-step random access procedure, or both.
This invention relates to wireless communication systems, specifically improving the efficiency of random access procedures in cellular networks. The problem addressed is the potential delays and inefficiencies in the four-step random access procedure, particularly during the transmission and retransmission of Msg3, which can lead to increased latency and reduced network performance. The method involves scheduling Msg3 transmissions or retransmissions in a four-step random access procedure. In a four-step random access procedure, a user device (UE) initiates communication by sending a Msg1 (random access preamble), receives a Msg2 (random access response) from the network, transmits Msg3 (RRC connection request or similar), and awaits Msg4 (contention resolution). The invention optimizes this process by dynamically scheduling Msg3 transmissions or retransmissions to reduce delays. This may include adjusting timing, resource allocation, or retransmission policies to ensure timely delivery of Msg3, improving overall network efficiency and reducing latency. The method can be applied to both initial Msg3 transmissions and subsequent retransmissions, ensuring reliable communication even in challenging conditions. By optimizing the scheduling of these critical messages, the invention enhances the performance of random access procedures in wireless networks.
15. The apparatus of claim 14, wherein the combination of the one or more consecutive uplink symbols and the one or more consecutive flexible symbols of each of the one or more corresponding transmission time intervals allow for the one or more repetitions to each be transmitted on a same starting symbol within a respective transmission time interval and have a same transmit duration.
This invention relates to wireless communication systems, specifically to apparatuses and methods for transmitting repeated signals in a flexible and synchronized manner. The problem addressed is the need for efficient and reliable transmission of repeated signals in wireless communication systems, particularly in scenarios where timing and resource allocation must be carefully managed to avoid interference and ensure proper reception. The apparatus includes a transmitter configured to transmit one or more repetitions of a signal across multiple transmission time intervals (TTIs). Each TTI contains a combination of consecutive uplink symbols and consecutive flexible symbols. The uplink symbols are dedicated for uplink transmissions, while the flexible symbols can be dynamically allocated for either uplink or downlink transmissions. The combination of these symbols in each TTI allows the repetitions to start at the same symbol position within each TTI and have the same transmit duration. This synchronization ensures that the repetitions are aligned in time, reducing complexity in the receiver and improving reliability. The flexible symbols provide adaptability, allowing the system to adjust resource allocation based on varying traffic conditions. The transmitter may also include a controller to manage the allocation of symbols and ensure proper synchronization of the repetitions across the TTIs. This approach enhances communication efficiency and reliability in wireless networks by maintaining consistent timing and duration for repeated transmissions.
16. The apparatus of claim 14, wherein the subset of the flexible symbols excludes flexible symbols configured as synchronization signal/physical broadcast channel (SS/PBCH) block symbols.
This invention relates to wireless communication systems, specifically to apparatuses for managing flexible symbol usage in a communication frame. The problem addressed is the need to efficiently allocate and exclude certain symbols in a communication frame to optimize resource utilization while avoiding conflicts with critical synchronization and broadcast functions. The apparatus includes a processor configured to determine a subset of flexible symbols within a communication frame, where these symbols can be dynamically allocated for different purposes such as data transmission, control signaling, or other functions. The subset excludes symbols that are designated as synchronization signal/physical broadcast channel (SS/PBCH) block symbols, ensuring that these essential symbols remain available for their primary role in cell synchronization and system information broadcasting. The processor further assigns the flexible symbols to specific functions based on network requirements, such as data transmission or control signaling, while avoiding interference with the excluded SS/PBCH block symbols. This selective allocation improves spectral efficiency and reduces overhead by dynamically reusing symbols that would otherwise remain unused, while maintaining reliable synchronization and broadcast capabilities. The apparatus may also include a transceiver to transmit and receive signals according to the allocated symbol assignments, ensuring proper communication within the network.
17. The apparatus of claim 14, wherein the grant schedules a Msg3 transmission in a four-step random access procedure, a Msg3 retransmission in the four-step random access procedure, or both.
This invention relates to wireless communication systems, specifically improving the efficiency of random access procedures in cellular networks. The problem addressed is the delay and resource inefficiency in existing four-step random access procedures, particularly during the transmission and retransmission of Msg3 messages. The invention provides an apparatus that schedules Msg3 transmissions or retransmissions in a four-step random access procedure to optimize network performance. The apparatus includes a processor configured to generate scheduling information for Msg3 messages, which are part of the random access process where a user device requests uplink resources from a base station. The scheduling information ensures timely and efficient allocation of resources, reducing latency and improving overall system throughput. The apparatus may also coordinate with other network components to manage retransmissions, ensuring reliable communication even in challenging radio conditions. By dynamically adjusting scheduling parameters, the invention enhances the efficiency of random access procedures, particularly in scenarios with high user device density or limited available resources. The solution is applicable to various wireless standards, including 5G and beyond, where low-latency and high-reliability communication are critical.
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May 24, 2023
April 30, 2024
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